| 碳糊电极阳极吸附伏安法测定大黄酸 |
| |
| 引用本文： | 严志红,黎拒难,高朋,毛勋.碳糊电极阳极吸附伏安法测定大黄酸[J].分析科学学报,2005,21(4):420-422. |
| |
| 作者姓名： | 严志红 黎拒难 高朋 毛勋 |
| |
| 作者单位： | 湘潭大学化学学院,湖南湘潭,411105 |
| |
| 摘 要： | 在pH4.2的HAc-NaAc底液中,大黄酸在碳糊电极(CPE)上有一灵敏的吸附氧化峰,峰电位为1.14V(vs.SCE)。该氧化峰的二阶导数峰电流与大黄酸的浓度在8.0×10-9~8.0×10-7mol/L(富集120s)范围内呈良好的线性关系(r=0.998),检出限为2×10-9mol/L(S/N=3,富集180s)。探讨了大黄酸在CPE上的伏安性质和电极反应机理,并将本法应用于中药大黄中的大黄酸的测定,结果良好。
|
| 关 键 词： | 大黄酸 碳糊电极 吸附伏安法 |
| 文章编号： | 1006-6144(2005)04-0420-03 |
| 收稿时间： | 2003-12-23 |
| 修稿时间： | 2003年12月23 |
Determination of Trace Rhein at a Carbon Paste Electrode by Adsorption Voltammetry |
| |
| YAN Zhi-hong,LI Ju-nan,GAO Peng,MAO Xun.Determination of Trace Rhein at a Carbon Paste Electrode by Adsorption Voltammetry[J].Journal of Analytical Science,2005,21(4):420-422. |
| |
| Authors: | YAN Zhi-hong LI Ju-nan GAO Peng MAO Xun |
| |
| Abstract: | The anodic adsorptive voltammetric determination of trace rhein was carried out at a carbon paste electrode.A sensitive adsorptive oxidation peak was yielded at 1.14 V(vs.SCE) in HAc-NaAc buffer solution.The second derivative peak current is directly proportional to the concentration of rhein in the range of 8.010~(-9)8.010~(-7) mol/L(r=0.998) for a 120 s accumulation.The detection limit is (2.0)10~(-9) mol/L(S/N=3).The proposed method was applied to the determination of rhein in Rheum officinale Baill with satisfactory results.The electrochemical behavior and the reaction mechanism of rhein at a carbon paste electrode were studied. |
| |
| Keywords: | Rhein Carbon paste electrode Adsorption voltammetry |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
